Specification for dimensions of housings for hydraulic seals for reciprocating applications 往复运动的液压密封件壳体尺寸规范
3.
Non destructive testing of steels tubes . part 1 : automatic electromagnetic testing of seamless and welded except submerged arc welded ferromagnetic steel tubes for verification of hydraulic leak - tightness 钢管的无损检验.第1部分:检验液压密封性用无缝和焊接铁磁钢管